Gauss–Newton-based fast and simple recursive algorithm for compensation using shunt active power filter

• Published in: IET generation, transmission & distribution Vol. 11; no. 6; pp. 1521 - 1530
• Main Authors: Chittora, Prakash, Singh, Alka, Singh, Madhusudan
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 20.04.2017
• Subjects: active filters; compensation; control circuits; digital signal processor; dspace 1104; fast MRGN control technique; gating circuits; harmonic problem; linear loads; load unbalancing; Matlab‐Simulink environment; modified recursive Gauss‐Newton algorithm; MRGN algorithm; neutral current problem; Newton method; nonlinear loads; power distribution; power factor; power harmonic filters; power quality problems; power supply quality; PQ problems; Research Article; SAPF; sensors; shunt active power filter; three‐phase four‐wire distribution systems; power harmonic filters; digital signal processor; shunt active power filter; neutral current problem; Newton method; SAPF; gating circuits; MRGN algorithm; fast MRGN control technique; Matlab-Simulink environment; three-phase four-wire distribution systems; harmonic problem; power factor; active filters; power supply quality; dspace 1104; power quality problems; modified recursive Gauss-Newton algorithm; sensors; load unbalancing; linear loads; control circuits; power distribution; compensation; nonlinear loads; PQ problems
• ISSN: 1751-8687; 1751-8695
• DOI: 10.1049/iet-gtd.2016.1222

Three-phase, four-wire systems are prone to various power quality (PQ) problems such as load unbalancing, low power factor, harmonics and problem of neutral current. Modified recursive Gauss–Newton (MRGN) algorithm is proposed to mitigate various PQ problems in four-wire distribution systems. The recursive Gauss–Newton method is quite complex, so it is modified to obtain simple and fast MRGN control technique. The proposed algorithm is developed using MATLAB/Simulink environment and tested for mitigation of various PQ problems. Thereafter, a hardware prototype for shunt active power filter (SAPF) is developed along with various sensors, control circuits using dspace 1104 as digital signal processor. Gating circuits provide proper gating pulses to control SAPF as per the new algorithm. Results with linear and non-linear loads have been tested under a variety of loading conditions and thoroughly analysed for its performance.